20561525

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{617}}^1$

素因数の和:701

約数の個数: 24

約数和(自身を含む): 26974464

約数和(自身を除く): 6412939

約数列:

[1, 5, 25, 31, 43, 155, 215, 617, 775, 1075, 1333, 3085, 6665, 15425, 19127, 26531, 33325, 95635, 132655, 478175, 663275, 822461, 4112305, 20561525]

約数ペア:

[(1, 20561525), (5, 4112305), (25, 822461), (31, 663275), (43, 478175), (155, 132655), (215, 95635), (617, 33325), (775, 26531), (1075, 19127), (1333, 15425), (3085, 6665)]